{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:EKOTADZV5YMERQ7KUDWA7EDKNC","short_pith_number":"pith:EKOTADZV","canonical_record":{"source":{"id":"1903.01374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2019-03-04T17:14:01Z","cross_cats_sorted":[],"title_canon_sha256":"b068e151d1ace21a13d03270d1e542e25dc04f0644ba978d47401a13adccc8d8","abstract_canon_sha256":"75a5ade17ff1ef4f0ecadc62a90d95aa5ef6ab1a47b4ed96a8b5ce7f1d70eb36"},"schema_version":"1.0"},"canonical_sha256":"229d300f35ee1848c3eaa0ec0f906a688e780b057f59ff0270faca4a47f7bad9","source":{"kind":"arxiv","id":"1903.01374","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.01374","created_at":"2026-05-17T23:45:03Z"},{"alias_kind":"arxiv_version","alias_value":"1903.01374v1","created_at":"2026-05-17T23:45:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.01374","created_at":"2026-05-17T23:45:03Z"},{"alias_kind":"pith_short_12","alias_value":"EKOTADZV5YME","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"EKOTADZV5YMERQ7K","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"EKOTADZV","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:EKOTADZV5YMERQ7KUDWA7EDKNC","target":"record","payload":{"canonical_record":{"source":{"id":"1903.01374","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2019-03-04T17:14:01Z","cross_cats_sorted":[],"title_canon_sha256":"b068e151d1ace21a13d03270d1e542e25dc04f0644ba978d47401a13adccc8d8","abstract_canon_sha256":"75a5ade17ff1ef4f0ecadc62a90d95aa5ef6ab1a47b4ed96a8b5ce7f1d70eb36"},"schema_version":"1.0"},"canonical_sha256":"229d300f35ee1848c3eaa0ec0f906a688e780b057f59ff0270faca4a47f7bad9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:03.957126Z","signature_b64":"HVFDTreKiUpEFvH6BUibjlgo1HBVepZyu66nyylN6EhOB9fPc8WF6WvqfqqjC8SE8ykMXwQpCQqmpGV/+pwFCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"229d300f35ee1848c3eaa0ec0f906a688e780b057f59ff0270faca4a47f7bad9","last_reissued_at":"2026-05-17T23:45:03.956473Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:03.956473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.01374","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:45:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dM6KwuLhIgqhZVJt+gUFONYb5Ng8cJIKmYQooDaOlKAjfdF4/dyCcLzFVnuB9kx+O/geUS5/WihMElSERPW3Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T06:23:15.644034Z"},"content_sha256":"f43ce7e60ebe821bf3ef8951dbca58389dc4eae3835093c334f5484178fdbe08","schema_version":"1.0","event_id":"sha256:f43ce7e60ebe821bf3ef8951dbca58389dc4eae3835093c334f5484178fdbe08"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:EKOTADZV5YMERQ7KUDWA7EDKNC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Boundary-induced effect on the spoke-like activity in ExB plasma","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"Andrei Smolyakov, Andrew Powis, Eduardo Rodriguez, Igor Kaganovich, Valentin Skoutnev, Yevgeny Raitses","submitted_at":"2019-03-04T17:14:01Z","abstract_excerpt":"The spoke instability in an $E\\times B$ Penning discharge is shown to be strongly affected by the boundary that is perpendicular to $B$ field lines. The instability is the strongest when bounded by dielectric walls. With a conducting wall, biased to collect electron current from the plasma, the spoke becomes faster, less coherent and localised closer to the axis. The corresponding anomalous cross-field transport is assessed via simultaneous time-resolved measurements of plasma potential and density. This shows a dominant large-scale $E\\times B$ anomalous character of the electron cross-field c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.01374","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:45:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X4eiHqq5qSXfo+VNYn0miF16d57quVyA9eoM/tzDJFuzEpjHUrSpH4TXAC9ZdoHr5FyZV3n9cL+prXb5kMJpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T06:23:15.644754Z"},"content_sha256":"7914566750d71c03cfe82e4732a4fdbf93d65f308a83f7dfb1eb81e80c26ebfa","schema_version":"1.0","event_id":"sha256:7914566750d71c03cfe82e4732a4fdbf93d65f308a83f7dfb1eb81e80c26ebfa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EKOTADZV5YMERQ7KUDWA7EDKNC/bundle.json","state_url":"https://pith.science/pith/EKOTADZV5YMERQ7KUDWA7EDKNC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EKOTADZV5YMERQ7KUDWA7EDKNC/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-10T06:23:15Z","links":{"resolver":"https://pith.science/pith/EKOTADZV5YMERQ7KUDWA7EDKNC","bundle":"https://pith.science/pith/EKOTADZV5YMERQ7KUDWA7EDKNC/bundle.json","state":"https://pith.science/pith/EKOTADZV5YMERQ7KUDWA7EDKNC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EKOTADZV5YMERQ7KUDWA7EDKNC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:EKOTADZV5YMERQ7KUDWA7EDKNC","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"75a5ade17ff1ef4f0ecadc62a90d95aa5ef6ab1a47b4ed96a8b5ce7f1d70eb36","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2019-03-04T17:14:01Z","title_canon_sha256":"b068e151d1ace21a13d03270d1e542e25dc04f0644ba978d47401a13adccc8d8"},"schema_version":"1.0","source":{"id":"1903.01374","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.01374","created_at":"2026-05-17T23:45:03Z"},{"alias_kind":"arxiv_version","alias_value":"1903.01374v1","created_at":"2026-05-17T23:45:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.01374","created_at":"2026-05-17T23:45:03Z"},{"alias_kind":"pith_short_12","alias_value":"EKOTADZV5YME","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"EKOTADZV5YMERQ7K","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"EKOTADZV","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:7914566750d71c03cfe82e4732a4fdbf93d65f308a83f7dfb1eb81e80c26ebfa","target":"graph","created_at":"2026-05-17T23:45:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The spoke instability in an $E\\times B$ Penning discharge is shown to be strongly affected by the boundary that is perpendicular to $B$ field lines. The instability is the strongest when bounded by dielectric walls. With a conducting wall, biased to collect electron current from the plasma, the spoke becomes faster, less coherent and localised closer to the axis. The corresponding anomalous cross-field transport is assessed via simultaneous time-resolved measurements of plasma potential and density. This shows a dominant large-scale $E\\times B$ anomalous character of the electron cross-field c","authors_text":"Andrei Smolyakov, Andrew Powis, Eduardo Rodriguez, Igor Kaganovich, Valentin Skoutnev, Yevgeny Raitses","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2019-03-04T17:14:01Z","title":"Boundary-induced effect on the spoke-like activity in ExB plasma"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.01374","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f43ce7e60ebe821bf3ef8951dbca58389dc4eae3835093c334f5484178fdbe08","target":"record","created_at":"2026-05-17T23:45:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"75a5ade17ff1ef4f0ecadc62a90d95aa5ef6ab1a47b4ed96a8b5ce7f1d70eb36","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2019-03-04T17:14:01Z","title_canon_sha256":"b068e151d1ace21a13d03270d1e542e25dc04f0644ba978d47401a13adccc8d8"},"schema_version":"1.0","source":{"id":"1903.01374","kind":"arxiv","version":1}},"canonical_sha256":"229d300f35ee1848c3eaa0ec0f906a688e780b057f59ff0270faca4a47f7bad9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"229d300f35ee1848c3eaa0ec0f906a688e780b057f59ff0270faca4a47f7bad9","first_computed_at":"2026-05-17T23:45:03.956473Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:03.956473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HVFDTreKiUpEFvH6BUibjlgo1HBVepZyu66nyylN6EhOB9fPc8WF6WvqfqqjC8SE8ykMXwQpCQqmpGV/+pwFCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:03.957126Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.01374","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f43ce7e60ebe821bf3ef8951dbca58389dc4eae3835093c334f5484178fdbe08","sha256:7914566750d71c03cfe82e4732a4fdbf93d65f308a83f7dfb1eb81e80c26ebfa"],"state_sha256":"a8c793a3ab07e025e4b43af1b3ea1d0c56d9c9d2105d6e19aa9d7816599eae50"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x/IAVYgHJqxzEf1SJLOFuN2YZlvHzWb/rSkttOJLGESFq0OO4NRpy29OVyc5loLDTIZi0ZH76fWTkqziJqEQAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T06:23:15.648788Z","bundle_sha256":"168317a15dbcedd60394ed521afc49186d410ad4f5d8546861ea0e7a13c52746"}}